Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RS3A(R4150M1019 found under Control Flame Safeguard by R D Miners Inc. The National Stock Number assigned to this part is 4540011694951, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RS3A(R4150M1019.